基于精确几何建模的复合电磁散射分析 |
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基于精确几何建模的复合电磁散射分析 Analysis of composite EM scattering based on accurate geometry modeling 发布时间：2011-08-19 浏览量：6 收藏数：1 评论数：1 总览 评价 李杰1， 何琼2， 郭立新2*， 魏兵2 （ 1、西安电子科技大学理学院； 2、西安电子科技大学理学院，西安 710071； ）
摘要： 本文主要研究导体二维粗糙面与三维半掩埋导体目标双站复合电磁散射，给出了一种粗糙面与目标复合散射建模方案。首先利用谱方法生成随机粗糙面并利用逆向工程方法获得连续曲面，进而与半掩埋目标结合获得精确的三维复合模型。在精确几何模型基础上，根据入射波频率对其进行表面网格剖分。接着利用物理光学近似方法和多层快速多级子方法对单一导体粗糙面以及粗糙面与目标复合体模型的电磁散射特性进行研究，计算了双站雷达散射截面，并给出了分析结果。
关键词： 无线电物理；复合散射；几何建模；物理光学；快速多级子 LI Jie1， He Qiong2， GUO Lixin2*， WEI Bing2 （ 1、School of Science, Xidian University； 2、School of Science, Xidian University, Xi'an 710071； ）
Abstract： An approach to studying composite EM scattering from 2-D rough surface and half-buried 3-D target is proposed in this paper, from geometry modeling to RCS analysis. First two dimensional rough surface is simulated with spectral method, which then is converted into a continuous curved surface though inverse engineering. Target model and rough surface model are combined together to be an very accurate composite CAD model, after which surface mesh is generated with the information of incidence frequency. Then physcs optical method (PO) and multi-level fast multipol algorithm (MLFMA) are respectively employed to study the scattering problem. The results of single rough surface and combinative model are given and the results by the two different method are compared.
Keywords： Radiophyscs; composite scattering; geometry modeling; physcs optics; MLFMA
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